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PCB developing tank cleaning solution and method for cleaning developing tank by using same

A tank cleaning and developer technology, applied in the direction of chemical paint/ink remover, coating, etc., can solve the problems of poor development, affecting the development spray pressure, easy to adhere to the cylinder, etc., to achieve ideal cleaning effect and short cleaning time short effect

Active Publication Date: 2014-07-16
SHENZHEN SHIRUITAI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unsensitized ink is washed away during development, and it is a paste, which is easy to adhere to the cylinder, forming dirt that is difficult to clean over time, and will block the nozzle, affect the development spray pressure, and cause poor development
Generally, PCB factories will require maintenance once a week during the production period, wash with sodium hydroxide for 2-3 hours, pickle for 1-2 hours after washing with water, and then wash with water and developer. This process is very complicated and consumes a lot of time. It lasts for 8-10 hours, and when using acid cleaning, it needs to be heated to above 40°C
Later, some people also tried to use glacial acetic acid to clean, but because of the strong pungent smell of glacial acetic acid, few people use this method now.

Method used

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  • PCB developing tank cleaning solution and method for cleaning developing tank by using same

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Embodiment Construction

[0053] In order to further illustrate the technical means adopted by the present invention and its effects, the following describes in detail in conjunction with preferred embodiments of the present invention and accompanying drawings.

[0054] The present invention provides a cleaning solution for PCB developing tank, which comprises components and mass percentages as follows:

[0055] Ethylene glycol butyl ether 10-20%,

[0056] Emulsifier 15-30%,

[0057] Acid 20-40%,

[0058] The balance is water.

[0059] Among them, ethylene glycol butyl ether is a colorless and flammable liquid. Because of its chemical structure, it has two groups with strong solubility functions - ether bond and hydroxyl group. The former is lipophilic and can dissolve hydrophobic compounds, while the latter It is hydrophilic and can dissolve hydrophilic compounds, so it has a strong dissolving ability and is known as a "universal solvent". As the bulking agent of the PCB developing tank cleaning s...

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PUM

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Abstract

The invention provides a PCB developing tank cleaning solution and a method for cleaning a developing tank by using the same. The PCB developing tank cleaning solution comprises the following components in percentage by mass: 10-20% of ethylene glycol monobutyl ether, 15-30% of an emulsifying agent, 20-40% of acid and the balance of water. Ethylene glycol monobutyl ether is used as a bulking agent in the PCB developing tank cleaning solution to ensure that non-photosensitive solder resist ink is gradually dissolved into the PCB developing tank cleaning solution, beads formed by the solder resist ink are further decomposed into very fine particles by using emulsifying agent, a layer of milky substances is formed on the surfaces of the particles, and therefore, the non-photosensitive solder resist ink remained in a PCB developing tank is effectively cleaned under the combination action of acid and water; when the developing tank is cleaned by using the PCB developing tank cleaning solution, the PCB developing tank cleaning solution is not needed to be heated to very high temperature, the cleaning time is relatively short, and the cleaning effect is rather ideal.

Description

technical field [0001] The invention relates to the field of PCB production, in particular to a PCB developing tank cleaning solution and a method for cleaning the developing tank using the PCB developing tank cleaning solution. Background technique [0002] Most of the solder resist inks used in PCB production are photosensitive inks, which belong to the category of polyurethane. Unsensitized ink is washed away during development and becomes a paste, which is easy to adhere to the cylinder, forming dirt that is difficult to clean over time, and will block the nozzle, affect the development spray pressure, and cause poor development. Generally, PCB factories will require maintenance once a week during the production period, wash with sodium hydroxide for 2-3 hours, pickle for 1-2 hours after washing with water, and then wash with water and developer. This process is very complicated and consumes a lot of time. It lasts for 8-10 hours, and when cleaning with acid, it needs t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D9/04
Inventor 方鸿昌王文剑
Owner SHENZHEN SHIRUITAI TECH
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